from django.core.files.uploadedfile import SimpleUploadedFile from django.forms import ClearableFileInput, FileField, Form, MultiWidget from .base import WidgetTest class FakeFieldFile: """ Quacks like a FieldFile (has a .url and string representation), but doesn't require us to care about storages etc. """ url = "something" def __str__(self): return self.url class ClearableFileInputTest(WidgetTest): def setUp(self): self.widget = ClearableFileInput() def test_clear_input_renders(self): """ A ClearableFileInput with is_required False and rendered with an initial value that is a file renders a clear checkbox. """ self.check_html( self.widget, "myfile", FakeFieldFile(), html=( """ Currently: something
Change: """ ), ) def test_html_escaped(self): """ A ClearableFileInput should escape name, filename, and URL when rendering HTML (#15182). """ class StrangeFieldFile: url = "something?chapter=1§=2©=3&lang=en" def __str__(self): return """something
.jpg""" self.check_html( ClearableFileInput(), "my
file", StrangeFieldFile(), html=( """ Currently: something<div onclick="alert('oops')">.jpg
Change: """ ), ) def test_clear_input_renders_only_if_not_required(self): """ A ClearableFileInput with is_required=True does not render a clear checkbox. """ widget = ClearableFileInput() widget.is_required = True self.check_html( widget, "myfile", FakeFieldFile(), html=( """ Currently: something
Change: """ ), ) def test_clear_input_renders_only_if_initial(self): """ A ClearableFileInput instantiated with no initial value does not render a clear checkbox. """ self.check_html( self.widget, "myfile", None, html='' ) def test_render_disabled(self): self.check_html( self.widget, "myfile", FakeFieldFile(), attrs={"disabled": True}, html=( 'Currently: something' '' '
' 'Change: ' ), ) def test_render_no_disabled(self): class TestForm(Form): clearable_file = FileField( widget=self.widget, initial=FakeFieldFile(), required=False ) form = TestForm() with self.assertNoLogs("django.template", "DEBUG"): form.render() def test_render_as_subwidget(self): """A ClearableFileInput as a subwidget of MultiWidget.""" widget = MultiWidget(widgets=(self.widget,)) self.check_html( widget, "myfile", [FakeFieldFile()], html=( """ Currently: something
Change: """ ), ) def test_clear_input_checked_returns_false(self): """ ClearableFileInput.value_from_datadict returns False if the clear checkbox is checked, if not required. """ value = self.widget.value_from_datadict( data={"myfile-clear": True}, files={}, name="myfile", ) self.assertIs(value, False) self.assertIs(self.widget.checked, True) def test_clear_input_checked_returns_false_only_if_not_required(self): """ ClearableFileInput.value_from_datadict never returns False if the field is required. """ widget = ClearableFileInput() widget.is_required = True field = SimpleUploadedFile("something.txt", b"content") value = widget.value_from_datadict( data={"myfile-clear": True}, files={"myfile": field}, name="myfile", ) self.assertEqual(value, field) self.assertIs(widget.checked, True) def test_html_does_not_mask_exceptions(self): """ A ClearableFileInput should not mask exceptions produced while checking that it has a value. """ class FailingURLFieldFile: @property def url(self): raise ValueError("Canary") def __str__(self): return "value" with self.assertRaisesMessage(ValueError, "Canary"): self.widget.render("myfile", FailingURLFieldFile()) def test_url_as_property(self): class URLFieldFile: @property def url(self): return "https://www.python.org/" def __str__(self): return "value" html = self.widget.render("myfile", URLFieldFile()) self.assertInHTML('value', html) def test_return_false_if_url_does_not_exists(self): class NoURLFieldFile: def __str__(self): return "value" html = self.widget.render("myfile", NoURLFieldFile()) self.assertHTMLEqual(html, '') def test_use_required_attribute(self): # False when initial data exists. The file input is left blank by the # user to keep the existing, initial value. self.assertIs(self.widget.use_required_attribute(None), True) self.assertIs(self.widget.use_required_attribute("resume.txt"), False) def test_value_omitted_from_data(self): widget = ClearableFileInput() self.assertIs(widget.value_omitted_from_data({}, {}, "field"), True) self.assertIs( widget.value_omitted_from_data({}, {"field": "x"}, "field"), False ) self.assertIs( widget.value_omitted_from_data({"field-clear": "y"}, {}, "field"), False ) def test_fieldset(self): class TestForm(Form): template_name = "forms_tests/use_fieldset.html" field = FileField(widget=self.widget) with_file = FileField(widget=self.widget, initial=FakeFieldFile()) clearable_file = FileField( widget=self.widget, initial=FakeFieldFile(), required=False ) form = TestForm() self.assertIs(self.widget.use_fieldset, False) self.assertHTMLEqual( '
' '
' '
Currently: ' 'something
Change:
' '
' 'Currently: something' '
Change:' '
', form.render(), ) def test_multiple_error(self): msg = "ClearableFileInput doesn't support uploading multiple files." with self.assertRaisesMessage(ValueError, msg): ClearableFileInput(attrs={"multiple": True})